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Arvid Heise avatarArvid Heise

[FLINK-16014][s3] Force usage of SAXParserFactory over XMLReaderFactory

This avoids a ClassNotFound exception of the underlying XML reader class in plugin classloaders.
Root cause is a bug in JDK8 (JDK-8015099). XMLReaderFactory caches the class name independent of the classloader. On EMR, xercesImpl is on classpath (because of HDFS) and will be loaded at some point in time.

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